src: centralize error logging into send_internal_server_error

Use only the exception messages as the main resource for error
messages.
The previous error code had string duplication in the form of:
	logging.error('msg here')
	raise Exception('msg here')

That approach also has the downside of having log duplication as
it had the local logging.err() and a global logging.exception()
inside send_internal_server_error capturing the exception message.
The actual code only requires raising an exception with a proper
error message.
Improve exception messages to give more error context.
Log every AssertionError as a backtrace.
Use the 'raise Exception from e' syntax to modify the a previously
raised exception 'e' into an exception with aditional context or
different type. This also prevents the message that warns about
newer exceptions being launch after an initial exception.

1 files changed, 2 insertions, 3 deletions

diff --git a/src/utils/boot.py b/src/utils/boot.py
index a5ff04b..c9b12ee 100644
--- a/src/utils/boot.py
+++ b/src/utils/boot.py
@@ -38,9 +38,8 @@ def _boot_bios_linux(disk, part, mountpoint):
     try:
         subprocess.run(shlex.split(kexec_cmd), check=True, text=True)
         subprocess.run(shlex.split(kexec_reboot_cmd), check=True, text=True)
-    except subprocess.CalledProcessError as e:
-        logging.error(f'Error processing kexec: {e}')
-        raise e
+    except OSError as e:
+        raise OSError(f'Error processing kexec: {e}') from e
 
 def _boot_bios_windows(disk, part, mountpoint):
     logging.info(f'Booting Windows system')